Hi, where can i find these great tanks?
 

http://www.micro-ir.com/combat/custom/index.html
Hi I was looking at this site and went into the professional section and saw all those really detailed tanks, are they for sale? Where can i find some american tanks, everywhere i look theres german, japanese, or russian tanks?

Those are custom made tanks, you won't find them for sale (unless whoever the person who made the tank offers them).

The M4 Sherman is an American Tank.